package facadePattern;/** * Created by Administrator on 2018-10-26. */public class Amplifier {   Tuner tuner;   DvdPlayer dvdPlayer;   public void on(){   }   public void off(){   }   public void Screen(){   }   public  void setTuner(Tuner tuner){       this.tuner = tuner;   }   public void  setDvdPlayer(DvdPlayer dvdPlayer){       this.dvdPlayer =dvdPlayer;   }}